The traitor is betrayed and the underground organization is in danger! The only secret message that can save the day must be sent from the enemy headquarters - and once the message is sent, Pei Bo's identity will be exposed immediately! But he smiled: no one knew that he, a small clerk in the Telecommunications Department, could hear the "fingerprint" of the code, and all encryption was in vain in front of him. Not only did he have to pass on information right under the enemy's nose, he also had to use their cipher machines to send out a magic stroke that would ruin the enemy's divisions. When the enemy who was sure of victory was led to a dead end by a secret message, Pei Bo's next move was quietly aimed at the top!
